hi i just bought a new 240 gallon tank that is 8x2x2. i wanted to know what should i do to get it running to put a black arowana that is coming this weekend. i added some water, aquarium salt and left it there since. should i buy some feeders to throw them in there, have the filteration running and a heater to be prepared? i want to have the water just right before i throw the arowana in. also can someone tell me what black water can do for me?